Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760694Ab3D3Nhh (ORCPT ); Tue, 30 Apr 2013 09:37:37 -0400 Received: from a9-42.smtp-out.amazonses.com ([54.240.9.42]:56778 "EHLO a9-42.smtp-out.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759102Ab3D3Nhg (ORCPT ); Tue, 30 Apr 2013 09:37:36 -0400 X-Greylist: delayed 314 seconds by postgrey-1.27 at vger.kernel.org; Tue, 30 Apr 2013 09:37:36 EDT Date: Tue, 30 Apr 2013 13:32:20 +0000 From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Tim Chen cc: Andrew Morton , Tejun Heo , Al Viro , Dave Hansen , Andi Kleen , linux-kernel , linux-mm Subject: Re: [PATCH 1/2] Make the batch size of the percpu_counter configurable In-Reply-To: Message-ID: <0000013e5b24d2c5-9b899862-e2fd-4413-8094-4f1e5a0c0f62-000000@email.amazonses.com> References: User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SES-Outgoing: 2013.04.30-54.240.9.42 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 727 Lines: 19 On Mon, 29 Apr 2013, Tim Chen wrote: > diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h > index d5dd465..5ca7df5 100644 > --- a/include/linux/percpu_counter.h > +++ b/include/linux/percpu_counter.h > @@ -22,6 +22,7 @@ struct percpu_counter { > struct list_head list; /* All percpu_counters are on a list */ > #endif > s32 __percpu *counters; > + int *batch ____cacheline_aligned_in_smp; > }; What is this for and why does it have that alignmend? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/